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100 lines
3.0 KiB
CMake
100 lines
3.0 KiB
CMake
# Find the native LLVM includes and library
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#
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# LLVM_INCLUDE_DIR - where to find llvm include files
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# LLVM_LIBRARY_DIR - where to find llvm libs
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# LLVM_CFLAGS - llvm compiler flags
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# LLVM_LFLAGS - llvm linker flags
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# LLVM_MODULE_LIBS - list of llvm libs for working with modules.
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# LLVM_FOUND - True if llvm found.
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# First look in ENV{LLVM_HOME} then system path.
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find_program(LLVM_CONFIG_EXECUTABLE llvm-config
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PATHS
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$ENV{LLVM_HOME}
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NO_DEFAULT_PATH
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)
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find_program(LLVM_CONFIG_EXECUTABLE llvm-config)
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find_program(LLVM_CLANG_EXECUTABLE clang++
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PATHS
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$ENV{LLVM_HOME}
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NO_DEFAULT_PATH
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)
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find_program(LLVM_CLANG_EXECUTABLE clang++)
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find_program(LLVM_OPT_EXECUTABLE opt
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PATHS
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$ENV{LLVM_HOME}
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NO_DEFAULT_PATH
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)
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find_program(LLVM_OPT_EXECUTABLE opt)
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if (NOT LLVM_CONFIG_EXECUTABLE)
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message(FATAL_ERROR "Could not find llvm-config")
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endif (NOT LLVM_CONFIG_EXECUTABLE)
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if (NOT LLVM_CLANG_EXECUTABLE)
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message(FATAL_ERROR "Could not find clang++")
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endif (NOT LLVM_CLANG_EXECUTABLE)
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if (NOT LLVM_OPT_EXECUTABLE)
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message(FATAL_ERROR "Could not find llvm opt")
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endif (NOT LLVM_OPT_EXECUTABLE)
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message(STATUS "LLVM llvm-config found at: ${LLVM_CONFIG_EXECUTABLE}")
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message(STATUS "LLVM clang++ found at: ${LLVM_CLANG_EXECUTABLE}")
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message(STATUS "LLVM opt found at: ${LLVM_OPT_EXECUTABLE}")
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execute_process(
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COMMAND ${LLVM_CONFIG_EXECUTABLE} --includedir
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OUTPUT_VARIABLE LLVM_INCLUDE_DIR
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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execute_process(
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COMMAND ${LLVM_CONFIG_EXECUTABLE} --libdir
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OUTPUT_VARIABLE LLVM_LIBRARY_DIR
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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# TODO: this does not work well. the config file will output -I/<include path> and
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# also -DNDEBUG. I've hard coded the #define that are necessary but we should make
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# this better. The necesesary flags are only #defines so maybe just def/undef those
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# around #include to llvm headers?
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#execute_process(
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# COMMAND ${LLVM_CONFIG_EXECUTABLE} --cppflags
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# OUTPUT_VARIABLE LLVM_CFLAGS
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# OUTPUT_STRIP_TRAILING_WHITESPACE
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#)
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set(LLVM_CFLAGS
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"-D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS")
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execute_process(
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COMMAND ${LLVM_CONFIG_EXECUTABLE} --ldflags
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OUTPUT_VARIABLE LLVM_LFLAGS
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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# Get the link libs we need. llvm has many and we don't want to link all of the libs
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# if we don't need them.
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execute_process(
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COMMAND ${LLVM_CONFIG_EXECUTABLE} --libnames core jit native ipo bitreader target
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OUTPUT_VARIABLE LLVM_MODULE_LIBS
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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# CMake really doesn't like adding link directories and wants absolute paths
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# Reconstruct it with LLVM_MODULE_LIBS and LLVM_LIBRARY_DIR
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string(REPLACE " " ";" LIBS_LIST ${LLVM_MODULE_LIBS})
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set (LLVM_MODULE_LIBS "-ldl")
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foreach (LIB ${LIBS_LIST})
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set(LLVM_MODULE_LIBS ${LLVM_MODULE_LIBS} "${LLVM_LIBRARY_DIR}/${LIB}")
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endforeach(LIB)
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message(STATUS "LLVM include dir: ${LLVM_INCLUDE_DIR}")
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message(STATUS "LLVM lib dir: ${LLVM_LIBRARY_DIR}")
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message(STATUS "LLVM libs: ${LLVM_MODULE_LIBS}")
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message(STATUS "LLVM compile flags: ${LLVM_CFLAGS}")
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